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HAProxy - Load balancer
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Willy Tarreau 1e16dc2eb4 BUG/MINOR: sample: limit the be2hex converter's chunk size 
In 2.5, commit da0264a96 ("MINOR: sample: Add be2hex converter")
introduced the be2hex() converter, which reads input data of a given
chunk size, processes it as a big endian block and turns it to hex
output.

There's an issue if the configured chunk_size (2nd argument) is larger
than tune.bufsize/2, because the max_size calculation will underflow,
and the later loop will always match since it compares a size_t to an
int (BTW, compilers love to annoy us with useless warnings but I never
found how to see some for these ones). This can result in overflowing
the output trash if  the input sample is at least as large as half a
buffer.

Let's add an explicit check for this, and change the max_size type to
size_t so that the comparison is always right. While we're at it, let's
ask the trash buffer to be twice as large, just like bin2hex() does, as
it may result in offering a larger buffer in 3.4. thanks to the large
buffers support.

Despite the risk, this is marked as minor because a config with that
large an argument in the converter makes absolutely no sense.

This should be backported to 2.6. The *2 for the trash allocation will
conflict and have to be dropped in stable versions, which is safe.
2026-05-23 20:06:36 +02:00
.github CI: github: add DEBUG_STRICT=2 to ASAN jobs 2026-04-30 17:46:30 +02:00
addons BUILD: 51d.c: cleanup, fix preprocessor ifdefs 2026-05-13 17:00:20 +02:00
admin CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
dev CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
doc MINOR: config: shm-stats-file is no longer experimental 2026-05-21 08:50:20 +02:00
examples MEDIUM: mux_quic: rename qmux traces to qcm 2026-05-13 16:23:58 +02:00
include CLEANUP: resolvers: fix comment typos and wrong filenames in file headers 2026-05-23 18:22:05 +02:00
reg-tests BUG/MINOR: h1: Don't mask websocket protocol if multiple protocols used 2026-05-19 17:50:50 +02:00
scripts SCRIPTS: announce-release: add a link to the OpenTelemetry filter 2026-05-08 12:05:09 +02:00
src BUG/MINOR: sample: limit the be2hex converter's chunk size 2026-05-23 20:06:36 +02:00
tests TESTS: quic: add unit-tests for QUIC TX part 2025-09-08 14:49:03 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-3 2025-10-09 14:06:48 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES CLEANUP: tree-wide: fix typos in user-invisible files 2026-05-13 17:03:48 +02:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.4-dev13 2026-05-20 17:46:36 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL DOC: update supported gcc and openssl versions in INSTALL 2026-05-20 17:45:23 +02:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile BUILD: traces: add USE_TRACE allowing to disable traces 2026-05-20 11:46:43 +02:00
README.md CI: github: add cross-zoo.yml in README.md 2026-04-20 11:47:20 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.4-dev13 2026-05-20 17:46:36 +02:00
VERSION [RELEASE] Released version 3.4-dev13 2026-05-20 17:46:36 +02:00

README.md

HAProxy

AWS-LC Illumos NetBSD CrossCompile FreeBSD VTest

HAProxy logo

HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.

Installation

The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.

Getting help

The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.

The issue tracker is only for bug reports or feature requests.

Documentation

The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.

Please refer to the following files depending on what you're looking for:

  • INSTALL for instructions on how to build and install HAProxy
  • BRANCHES to understand the project's life cycle and what version to use
  • LICENSE for the project's license
  • CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory:

License

HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.